155593395551 has 16 divisors (see below), whose sum is σ = 171394831008. Its totient is φ = 141238789120.

The previous prime is 155593395527. The next prime is 155593395557.

155593395551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 155593395551 - 2³⁰ = 154519653727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155593395557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814751 + ... + 987423.

It is an arithmetic number, because the mean of its divisors is an integer number (10712176938).

Almost surely, 2^155593395551 is an apocalyptic number.

155593395551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155593395551 is a deficient number, since it is larger than the sum of its proper divisors (15801435457).

155593395551 is an equidigital number, since it uses as much as digits as its factorization.

155593395551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173383 (or 173361 counting only the distinct ones).

The product of its digits is 11390625, while the sum is 56.

The spelling of 155593395551 in words is "one hundred fifty-five billion, five hundred ninety-three million, three hundred ninety-five thousand, five hundred fifty-one".